一、土壤处理法此种方法就是将药剂施撒到土壤表面,形成一个药剂封闭层,当杂草萌发时幼芽、芽根接触药剂,或者通过根、芽鞘、胚轴、子叶等部分吸收,而后抑制或杀死杂草,从而达到防止杂草的目的。此法优点是省工、简便、除草效果好,安全性较大。土壤处理法可在播种前,播后苗前和苗后做定向施药。主要施药方法有下列几种。 First, the soil treatment method This method is to spread the agent to the soil surface, the formation of a drug seal layer, when the weeds germination buds, roots contact with agents, or through the roots, bud sheath, hypocotyl, cotyledons and other parts of the absorption , And then inhibit or kill weeds, so as to achieve the purpose of preventing weeds. The advantages of this method is labor-saving, simple, good weeding effect, safety. Soil treatment can be sowed before and after sowing before and after seedlings do directional application. The main methods of application are the following.